According to a Yale poll, 71% of the American believe that global warming is real. 48% agree that there is a large consensus among the climate scientists on global warming. And 40% believe global warming is still a subject of significant scientific disagreement.

Concentrations of greenhouse gases in the atmosphere are increasing at an alarming rate. Majority of the world’s climate scientists agree that human activities are indeed the main reason behind climate change.

Climate is the average atmospheric condition of a particular place. It is different from weather because weather changes continuously but climate changes every 30 to 35 years. For example: If it rains continuously in a place every day, the climate there is monsoon. The pattern of weather of a place is known as the climate of a place.